KR20020041492A - color plasma display panel with an improvement of white-color temperature - Google Patents

Abstract

PURPOSE: A color plasma display panel for improving color temperature of white color is provided to improve the color temperature of the white color by compensating luminance of blue color. CONSTITUTION: A plurality of electrode group including X electrodes and Y electrodes is formed on side of a front substrate(1). A multitude of discharge cell is formed on intersections between the electrode groups of the front substrate(1) and address electrodes(5) formed one side of a rear substrate(2). A fluorescent layer(9) of R, G, and B is used for displaying an image. A dye for revealing blue color is added to black stripes(13,14). The black stripes(13,14) of a stripe structure or a matrix structure are formed on the front substrate(1) by mixing the dye with the black stripe formation material. The luminance of a B fluorescent body is compensated in a discharge process since the dye for revealing blue color is added to the black stripes(13,14). A reddish white color or a greenish white color is removed from a screen by compensating the luminance of the B fluorescent body and the color temperature is improved thereby.

Description

Color plasma display panel with an improvement of white-color temperature}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color plasma display panel having improved white color temperature, and more particularly, to improving white color temperature by increasing blue brightness.

There are two types of plasma display panel apparatus (PDP), so-called AC type and DC type. In the AC type PDP, the electrode of the discharge space in the panel is covered with a dielectric layer, and the discharge charge reciprocates on the dielectric layer, so It is called type, AC type. In this AC type drive device and drive method, the pulses for display emit light continuously by the memory effect due to wall charges on the dielectric layer. On the other hand, in the DC type PDP, the electrodes in the panel are exposed in the discharge space, and charges caused by the discharge flow into the external circuit through the electrodes. Therefore, this type of PDP is called DC type, that is, DC type, and the memory function of the display pulse is executed by floating charge in the discharge space.

In addition, AC type plasma display panels include a two-electrode type for performing selective discharge (address discharge) and sustain discharge on two electrodes, and a three-electrode type for performing address discharge using a third electrode. In a color plasma display panel that performs multi-gradation display, the phosphor in the cell is excited by ultraviolet rays generated by the discharge. However, this phosphor has a drawback that it is very weak to the impact of ions, which are static charges simultaneously generated by the discharge. In the mold, since the phosphor directly confronts the ions, there is a fear that the lifetime of the phosphor is reduced. Therefore, in the color plasma display panel, a three-electrode type (that is, a surface discharge type AC plasma display panel) using surface discharge is generally used.

FIG. 1 shows a configuration of the above-described surface discharge type AC plasma display panel as a schematic partial cross-sectional view of a discharge cell which is one display cell, and FIG. 2 shows a waveform diagram for driving the same. As shown in Fig. 1, in the plasma display panel, a front electrode group formed of the X electrode 3 and the Y electrode 4 is formed on the front substrate 1, and a dielectric layer 6 is formed thereon. In addition, an address electrode 5 is formed on the opposite rear substrate 2 of the front substrate 1, a dielectric layer 7 is formed thereon, and discharge gas is formed between the front substrate 1 and the front substrate 1. The partition 8 is formed to give a constant discharge space to be charged, and R, G, and B fluorescent layers 9 are formed between the partitions 8. In addition, the X electrode 3 and the Y electrode 4 are composed of an ITO electrode which is a transparent electrode so as not to inhibit light transmission of the front substrate 1, and in order to prevent voltage drop, a metal having a smaller area than this. Bus electrodes 3 ', 4' which are electrodes.

The driving method applied to the plasma display panel configured as described above includes an address / oil dielectric separation method (disclosed in Japanese Patent Laid-Open Publication No. Hei 4-195188 (1992)) and an address / oil dielectric multiple method (Japanese Patent Number). 2,528,195), but mainly an address / dielectric field separation method is applied. As shown in FIG. 2, one field (frame) is displayed for gray scale display, for example. The subfields are divided into first to eighth subfields, and each subfield is composed of a reset period, an address period, and a sustain period, and each subfield is set with a specific sustain period. The gray level of the screen is displayed.

In the reset period, each subfield is initialized with wall charges such as the dielectric layer 6, and in the address period, selective write discharge (i.e., address discharge) of display data is performed for the selected cells after the reset period is executed. The sustain discharge is repeatedly performed so that one subfield is displayed by repeating the light emission display of the display cell selected by the address discharge.

In the circuit for the above driving method, although not shown, the address pulse at the time of address discharge is applied to the address electrode 5 by the address driver, and the address driver is controlled by the control circuit. The Y electrodes 4 are each connected to a Y scan driver, the scan driver is connected to a common driver on the Y side, pulses during address discharge are generated by the scan driver, and sustain pulses and the like are common on the Y side. Generated by the driver, these pulses are applied to the Y electrode 4 via the Y scan driver. The common driver on the Y side is controlled by the common driver control unit provided in the panel drive control unit, and the Y scan driver is controlled by the scan driver control unit installed in the panel drive control unit. The X electrodes 3 are commonly connected through all the display lines of the plasma display panel. The common driver on the X side generates a write pulse, a sustain pulse, and the like, and is controlled by the common driver control unit. The common driver control unit, the scan driver control unit and the control circuit are controlled by the vertical synchronizing signal and the horizontal synchronizing signal input to the panel driving control unit from the outside of the apparatus, the display data signal input to the display data control unit and the clock. In addition, the display data signal input in accordance with the clock is stored in the frame memory.

In the surface discharge AC type plasma display panel in which the structure and driving method are described as an example of the plasma display panel, the fluorescent layers 9 of R, G, and B form display cells for R, G, and B phosphors, respectively. While it is composed of a stripe shape or a delta structure, the black stripe (3 ", 4") is formed on the front substrate (1) as shown in Figure 1 to improve the contrast of the colors of R, G, B do.

However, such black stripe 3 ", 4" alone has a disadvantage in that the color temperature is low because the luminance of the blue phosphor among the R, G, and B phosphors is low. Accordingly, there is a problem that the implementation of white becomes difficult because the screen looks reddish or greenish on the white.

Accordingly, an object of the present invention is to provide a color plasma display panel in which the luminance of blue is increased to improve the color temperature of white.

1 is a schematic partial cross-sectional view for explaining the configuration of a three-electrode plasma display panel;

2 is a pulse waveform diagram for explaining a driving method of a three-electrode plasma display panel;

3 is a schematic partial cross-sectional view similar to FIG. 1 in which an embodiment of the present invention is applied to a three-electrode color plasma display panel;

4 is a schematic partial cross-sectional view similar to FIG. 1 in which another embodiment of the present invention is applied to a three-electrode type color plasma display panel.

<Description of the symbols for the main parts of the drawings>

1: front board 2: back board

3: X electrode 3 ', 4': bus electrode

3 ", 4": Black stripe 4: Y electrode

5: address electrode 6, 7: dielectric layer

8: partition 9: fluorescent layer

In order to achieve the above object, a color plasma display panel having improved luminance of blue according to an embodiment of the present invention includes a front substrate on which at least a plurality of electrodes are formed, and a display (discharge) cell at a point intersecting the electrodes. A plurality of address electrodes formed on the rear substrate so as to face the electrodes, a fluorescent layer of R, G, and B phosphors for displaying an image by discharge of the electrodes and address electrodes, and R, G, A color plasma display panel comprising a black stripe formed to improve contrast of three colors of color B, wherein the black stripe is a black stripe to which a dye for expressing a blue color is added to the black stripe. In the case of including the partition wall, at least part of the partition wall contains a dye for expressing blue color, or the partition wall It is also preferable that a dye layer expressing a blue color is formed in at least a part of the composition, and may be composed of a combination thereof.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a schematic partial cross-sectional view of applying an embodiment of the present invention to a surface discharge AC color plasma display panel.

In FIG. 3, a dye for expressing a blue color is added to the black stripes 13 and 14. The black stripes 13 and 14 are formed in a structure such as a stripe or a matrix on the front substrate 1 according to a conventional method by mixing a dye with a black stripe forming material.

In this way, when the dye that expresses blue color is added to the black stripe 13 and 14, and the panel emits light during discharge, the luminance of the B phosphor having low luminance among the R, G, and B phosphors can be compensated. This white can be prevented from appearing reddish or greenish, and the white can be implemented. As a result, the color temperature can be improved.

4 is a schematic partial cross-sectional view of applying another embodiment of the present invention to a surface discharge AC color plasma display panel.

In FIG. 4, a blue dye layer 29 expressing blue color is formed on the partition wall 28. As such, the blue dye layer 29 is formed on the partition 28 to prevent the screen from appearing reddish or greenish, similar to the above embodiment. You can do it.

The blue dye layer 29 may be formed in place of the black bulkhead, which is an upper layer, when the barrier rib is formed in a double form to form the black bulkhead.

In addition, as in the configuration in which the blue dye is added to the black stripe 13 and 14 described above, a dye for expressing a blue color may be added to the partition 8 of FIG. 1.

Although not shown, it is also possible to form a dye layer with a dye which expresses a blue color on a conventional black stripe 3 ", 14" similarly to FIG.

In addition, the above-described methods may be mixed, and in this case, it is expected that a greater effect can be obtained.

Although the present invention is shown and described as being applied to the three-electrode type, it can be applied to the two-electrode type and the like in the color plasma display panel, and can be applied regardless of the AC type and the DC type.

In addition, in the above-described black stripe 13 and 14, the term "stripe" may be replaced with the term "matrix" and means simply formed of a light absorbing material, and is not limited to the stripe structure.

According to the configuration and operation of the color plasma display panel which improved the color temperature of the white according to the embodiment of the present invention described above, blue by adding a blue dye to the black stripe and / or partition, and / or forming a blue dye layer It is possible to improve the color temperature of white by increasing the luminance of the light.

Claims (3)

A front substrate 1 having at least a plurality of electrodes X and / or Y formed thereon, and a rear substrate facing the electrodes X and / or Y so as to form a display (discharge) cell at each point intersecting the electrodes; A plurality of address electrodes 5 formed on (2), fluorescent layers 9 of R, G and B phosphors for displaying an image by discharge of the electrodes X, Y and address electrodes 5, In a color plasma display panel comprising black stripes 3 ", 4" formed to improve contrast of three colors R, G, and B of the fluorescent layer 9, A color plasma display panel with improved color temperature of white, characterized in that the black stripe (13, 14) is added to the black stripe (3 ", 4") to express a blue color. A front substrate 1 having at least a plurality of electrodes X and / or Y formed thereon, and a rear substrate facing the electrodes X and / or Y so as to form a display (discharge) cell at each point intersecting the electrodes; A plurality of address electrodes 5 formed in (2), and fluorescent layers 9 of R, G, and B phosphors for displaying an image by discharge of the electrodes X and / or Y and the address electrodes 5 And a partition wall (8) provided between the front substrate (1) and the rear substrate (2) to provide a constant discharge space filled with discharge gas. The color plasma display panel which improved the color temperature of white characterized by including the dye which expresses blue color in at least one part of the partition (8). The front substrate 1 having at least a plurality of electrodes X and Y formed thereon, and the rear substrate 2 opposed to the electrodes X and / or Y so as to form a display (discharge) cell at each point intersecting the electrodes. A plurality of address electrodes 5 formed on the?, Phosphor layers 9 of R, G, and B phosphors for displaying an image by discharge of the electrodes X and / or Y and the address electrode 5, In the color plasma display panel comprising a partition wall 28 provided to provide a constant discharge space filled with the discharge gas between the front substrate 1 and the rear substrate 2, at least part of the partition 28 The color plasma display panel which improved the color temperature of white characterized by the above-mentioned.